Unicorn Tang feeding question

[DJISIS]

I just brought home a juv. Unicorn tang, iI also have a Coral Beauty that I supplement dried seaweed twice a week or so.How often should I keep a seaweed clip in the tank for them without raising my nitrates, or algea too much?? I had a problem with high nitrates, then cut back on my feeding aloto, anf they're below 20 ppm now, and I would like them to stay low, but the Tang, and Angel appear VERY thankful for the dried seaweed!! What should I do??

 

[Toddrtrex]

Honestly, if this is for your 75, I would take the tang back. They can/will get up to 2 feet long.